docs: update RHI API docs
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docs/api/rhi/opengl/swap-chain/get-framebuffer-width.md
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docs/api/rhi/opengl/swap-chain/get-framebuffer-width.md
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# OpenGLSwapChain::GetFramebufferWidth
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```cpp
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int GetFramebufferWidth() const;
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```
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获取帧缓冲区宽度。
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**返回:** 帧缓冲区宽度(像素)
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**线程安全:** ❌
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**注意:**
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- 帧缓冲区大小可能与窗口大小不同(HiDPI 显示)
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- 通过 `glfwGetFramebufferSize` 获取
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**示例:**
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```cpp
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int fbWidth = swapChain->GetFramebufferWidth();
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```
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## 相关文档
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- [OpenGLSwapChain 总览](swap-chain.md)
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- [GetFramebufferHeight](get-framebuffer-height.md) - 获取帧缓冲高度
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